From 1091e9c83d65ab4a549aa31ac169016adcce08ed Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 6 Apr 2026 15:35:49 +0000
Subject: [PATCH] Add array parser error tests

Agent-Logs-Url: https://github.com/wesleyel/swiftui-math/sessions/56436444-e15b-4dd0-8a70-c87df1e3dc4e

Co-authored-by: wesleyel <48174882+wesleyel@users.noreply.github.com>
---
 .../Internal/Syntax/ParserTests.swift         | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/Tests/SwiftUIMathTests/Internal/Syntax/ParserTests.swift b/Tests/SwiftUIMathTests/Internal/Syntax/ParserTests.swift
index 7f96821..cb37f17 100644
--- a/Tests/SwiftUIMathTests/Internal/Syntax/ParserTests.swift
+++ b/Tests/SwiftUIMathTests/Internal/Syntax/ParserTests.swift
@@ -1089,6 +1089,28 @@ struct ParserTests {
     #expect(latex.contains("\\right."))
   }
 
+  @Test
+  func arrayRejectsInvalidColumnFormat() throws {
+    let str = "\\begin{array}{xyz}a\\end{array}"
+    var error: Math.ParserError? = nil
+
+    let list = Math.Parser.build(fromString: str, error: &error)
+
+    #expect(list == nil)
+    #expect(error?.code == .invalidEnvironment)
+  }
+
+  @Test
+  func arrayRejectsTooFewColumnSpecifiers() throws {
+    let str = "\\begin{array}{l}a&b\\end{array}"
+    var error: Math.ParserError? = nil
+
+    let list = Math.Parser.build(fromString: str, error: &error)
+
+    #expect(list == nil)
+    #expect(error?.code == .invalidNumberOfColumns)
+  }
+
   @Test
   func defaultTable() throws {
     let str = "x \\\\ y"